condition mean min max ZT0-3 1037.8 1037.8 1037.8 ZT4-7 753.4 753.4 753.4 ZT8-11 501.05 501.05 501.05 ZT12-15 587.3 587.3 587.3 ZT16-19 706.0 706.0 706.0 ZT20-23 932.4 932.4 932.4